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| #Front-end Developer Job Interview Questions | ||
| #JOB INTERVIEW QUESTIONAIRRE | ||
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| @version 1.0 | ||
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| ##Contributors | ||
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| @ajpiano (http://ajpiano.com/), @paul_irish (http://paulirish.com/), @SlexAxton (http://alexsexton.com/), @boazsender (http://boazsender.com/), @vladikoff (http://vladfilippov.com/), @gf3 (http://gf3.ca/) and @darcy_clarke (http://darcyclarke.me) | ||
| @ajpiano (http://ajpiano.com/), @paul_irish (http://paulirish.com/), @SlexAxton (http://alexsexton.com/), @boazsender (http://boazsender.com/), @vladikoff (http://vladfilippov.com/), @gf3 (http://gf3.ca/) and @darcy_clarke (http://darcyclarke.me) | ||
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| ## General Questions: | ||
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| * Are you on Twitter? | ||
| * If so, who do you follow on Twitter? | ||
| * Are you on Github? | ||
| * If so, what are some examples of repos you follow | ||
| * What blogs do you follow? | ||
| * What version control systems have you used? | ||
| * What is your preferred development enviroment? (OS, Editor, Browsers, Tools etc.) | ||
| * Can you describe your workflow when you create a web page? | ||
| * Can you describe the difference between progressive enhancement and graceful degredation? | ||
| * Bonus points for the answer "no one can" | ||
| * Extra bonus points for describing feature detection | ||
| * Explain what "Semantic HTML" means. | ||
| * What does "minification" do? | ||
| * Why is it better to serve site assets from multiple domains? | ||
| * How many resources will a browser download from a given domain at a time? | ||
| * If you have 8 different stylesheets for a given design, how would you integrate them into the site? | ||
| * Looking for file concatenation. | ||
| * Points off for `@import`, unless it works in conjunction with a build system. | ||
| * If you jumped on a project and they used tabs and you used spaces, what would you do? | ||
| * `issue :retab! command` | ||
| * Write a simple slideshow page | ||
| * Bonus points if it does not use JS. | ||
| * What tools do you use to test your code's performance? | ||
| * If you could master one technology this year, what would it be? | ||
| * Name 3 ways to decrease page load. (perceived or actual load time) | ||
| * Explain the importance of standards. | ||
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| ## HTML-Specific Questions: | ||
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| * What's a `doctype` do, and how many can you name? | ||
| * What's the difference between standards mode and quirks mode? | ||
| * What are the limitations when serving XHTML pages? | ||
| * Are there any problems with serving pages as `application/xhtml+xml`? | ||
| * How do you serve a page with content in multiple languages? | ||
| * Can you use XHTML syntax in HTML5? How do you use XML in HTML5? | ||
| * What are `data-` attributes good for? | ||
| * What are the content models in HTML4 and are they different in HTML5? | ||
| * Consider HTML5 as an open web platform. What are the building blocks of HTML5? | ||
| * Describe the difference between cookies, sessionStorage and localStorage. | ||
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| ## JS-Specific Questions | ||
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| * Which JavaScript libraries have you used? | ||
| * How is JavaScript different from Java? | ||
| * What are `undefined` and `undeclared` variables? | ||
| * What is a closure, and how/why would you use one? | ||
| * Your favorite pattern used to create them? argyle (Only applicable to IIFEs) | ||
| * What's a typical use case for anonymous functions? | ||
| * Explain the "JavaScript module pattern" and when you'd use it. | ||
| * Bonus points for mentioning clean namespacing. | ||
| * What if your modules are namespace-less? | ||
| * how do you organize your code? (module pattern, classical inheritance?) | ||
| * What's the difference between host objects and native objects? | ||
| * Difference between: | ||
| ```javascript | ||
| function Person(){} var person = Person() var person = new Person() | ||
| ``` | ||
| * What's the difference between `.call` and `.apply`? | ||
| * explain `Function.prototype.bind`? | ||
| * When do you optimize your code? | ||
| * Can you explain how inheritance works in JavaScript? | ||
| * Bonus points for the funny answer: "no one can" | ||
| * Extra bonus points if they take a stab at explaining it | ||
| * When would you use `document.write()`? | ||
| * Correct answer: 1999 - time to weed out the junior devs | ||
| * What's the difference between feature detection, feature inference, and using the UA string | ||
| * Explain AJAX in as much detail as possible | ||
| * Explain how JSONP works (and how it's not really AJAX) | ||
| * Have you ever used JavaScript templating, and if so, what/how? | ||
| * Explain "hoisting". | ||
| * What is FOUC? How do you avoid FOUC? | ||
| * Describe event bubbling. | ||
| * What's the difference between an "attribute" and a "property"? | ||
| * Why is extending built in JavaScript objects not a good idea? | ||
| * Why is extending built ins a good idea? | ||
| * Difference between document load event and document ready event? | ||
| * What is the difference between `==` and `===`? | ||
| * Explain how you would get a query string parameter from the browser window's URL. | ||
| * Explain the same-origin policy with regards to JavaScript. | ||
| * Explain event delegation. | ||
| * Describe inheritance patterns in JavaScript. | ||
| * Make this work: | ||
| ```javascript | ||
| [1,2,3,4,5].duplicator(); // [1,2,3,4,5,1,2,3,4,5] | ||
| ``` | ||
| * Describe a strategy for memoization in JavaScript. | ||
| * Why is it called a Ternary statement, what does the word "Ternary" indicate? | ||
| * What is the arity of a function? | ||
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| ## JS-Code Examples: | ||
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| ```javascript | ||
| >~~3.14 | ||
| Question: What value is returned from the above statement? | ||
| **Answer: 3** | ||
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| ```javascript | ||
| "i'm a lasagna hog".split("").reverse().join(""); | ||
| ``` | ||
| Question: What value is returned from the above statement? | ||
| **Answer: "goh angasal a m'i"** | ||
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| ```javascript | ||
| ( window.foo || ( window.foo = "bar" ) ); | ||
| ``` | ||
| Question: What is the value of window.foo? | ||
| **Answer: "bar"** | ||
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| ```javascript | ||
| var foo = "Hello"; (function() { var bar = " World"; alert(foo + bar); })(); alert(foo + bar); | ||
| ``` | ||
| Question: What is the outcome of the two alerts above? | ||
| **Answer: "Hello World" & ReferenceError: bar is not defined** | ||
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| ## jQuery-Specific Questions: | ||
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| * Explain "chaining". | ||
| * What does `.end()` do? | ||
| * How, and why, would you namespace a bound event handler? | ||
| * What is the effects (or fx) queue? | ||
| * What is the difference between `.get()`, `[]`, and `.eq()`? | ||
| * What is the difference between `.bind()`, `.live()`, and `.delegate()`? | ||
| * What is the difference between `$` and `$.fn`? Or just what is `$.fn`. | ||
| * Optimize this selector: | ||
| ```javascript | ||
| $(".foo div#bar:eq(0)") | ||
| ``` | ||
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| ## CSS-Specific Questions: | ||
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| * Describe what a "reset" CSS file does and how it's useful. | ||
| * Describe Floats and how they work. | ||
| * What are the various clearing techniques and which is appropriate for what context? | ||
| * Explain CSS sprites, and how you would implement them on a page or site. | ||
| * What are the differences between the IE box model and the W3C box model? | ||
| * What are your favourite image replacement techniques and which do you use when? | ||
| * CSS property hacks, conditionally included .css files, or... something else? | ||
| * How do you serve your pages for feature-constrained browsers? | ||
| * What techniques/processes do you use? | ||
| * What are the different ways to visually hide content (and make it available only for screenreaders)? | ||
| * Have you ever used a grid system, and if so, what do you prefer? | ||
| * Hav you used or implement media queries or mobile specific layouts/CSS? | ||
| * Any familiarity with styling SVG? | ||
| * How do you optimize your webpages for print? | ||
| * What are some of the "gotchas" for writing efficient CSS? | ||
| * Do you use LESS? | ||
| * How would you implement a web design comp that uses non-standard fonts? (avoid mentioning webfonts so they can figure it out) | ||
| * Explain how a browser determines what elements match a CSS selector? | ||
| ## Optional fun Questions: | ||
| * What's the coolest thing you've ever coded, what are you most proud of? | ||
| * Do you know the HTML5 gang sign? | ||
| * Are you now, or have you ever been, on a boat. | ||
| * Tell me your favorite parts about Firebug / Webkit Inspector. | ||
| * Do you have any pet projects? What kind? | ||
| * Explain the significance of "cornify". | ||
| * On a piece of paper, write down the letters A B C D E vertically. Now put these in descending order without writing one line of code. | ||
| * Wait and see if they turn the paper upside down | ||
| * This should make the laugh and is a fine way to relieve some tension at the end of the interview. | ||
| * Pirate or Ninja? | ||
| * Bonus if it's a combo and a good reason was given (+2 for zombie monkey pirate ninjas) | ||
| * If not Web Development what would you be doing? | ||
| * Where in the world is Carmen Sandiego? (hint: they'e answer is always wrong) | ||
| * What's your favorite feature of Internet Explorer? |
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